Viking Global Investors ATI trades
Ole Andreas Halvorsen
Ole Andreas Halvorsen ATI Inc stake
total: 670
Trades details
- Total transactions:
- 2
- New positions:
- 1
- Reduced:
- 1
- Held since:
- 2026 Q1
- Held for:
- 2 quarters
- Latest activity:
- 2026 Q2
According to 2026 Q2 report, Ole Andreas Halvorsen holds 1,153,880 ATI Inc (ATI) shares with a market value of roughly $227.43M accounting for 0.65% of the overall portfolio. To date, the estimated cost basis is nearly $145.46 for "buy" trades and estimated average "sell" price is $197.1. Viking Global Investors first purchased ATI in 2026 Q1, initially acquiring about 3.33M shares. Since the initial investment in ATI Inc (ATI), Viking Global Investors has made 1 more transaction.
When did Ole Andreas Halvorsen buy ATI Inc (ATI)?
Ole Andreas Halvorsen first invested in ATI Inc (ATI) in 2026 Q1 at the reported quarter-end price of $145.46 per share.
What's the cost basis of Viking Global Investors's ATI stake?
The estimated cost basis for ATI Inc (ATI) stake is around $145.46 per share. This represents their average reported price* across all buy transactions
Estimated cost basis*
- Weighted AVG buy price:
- $145.46
- Weighted AVG sell price:
- $197.10
Ole Andreas Halvorsen's historical trades in ATI Inc
2 results
| Period |
% of portfolio |
Shares held after* |
Reported price* |
Value* |
% (shares) of activity |
% change to portfolio |
|---|---|---|---|---|---|---|
|
2026 Q2
|
0.65%
|
1,153,880
|
$197.10
|
$227,429,748
|
-65.38% (-2,178,963)
|
-1.2%
|
|
2026 Q1
|
1.36%
|
3,332,843
|
$145.46
|
$484,795,343
|
new
|
+1.36%
|
* Shares, change to shares, sold shares, shares held after: split-adjusted.
* Reported price: this doesn't represent the actual buy or sell price. It is the split-adjusted price of the security as of the last day of the reported period.
If the security is completely sold out, we show the reported split-adjusted price prior to the actual period.
If the security is completely sold out, we show the reported split-adjusted price prior to the actual period.
* Estimated cost basis: based on "Reported price*" (not earlier than 2013 Q2). Calculation starts from the latest "new buy" activity to the latest "close out" activity (if any).
* Value or Price: If the security is completely sold out, we show the reported value (or price) prior to the actual period.
* New buy or own: this means there is no earlier reporting (for us or in general). So we can't know if the actual purchase of the security happened at the reported period or earlier.